[Paraview] Particle tracer

Thu Apr 19 15:48:13 EDT 2012

Thanks John.
I don't mind, just that I have reproduce hundreds of gygabytes in vtu
format. :-)
I learn patience I guess.

Best,
Mohamad

On Wed, Apr 18, 2012 at 11:19 PM, Biddiscombe, John A. <biddisco at cscs.ch>wrote:

>  If using a VTU works and a VTR crashes, then it’s definitely a bug.****
>
> ** **
>
> I’ve been working on temporal fixes for a long time (i.e. not working
> hard), and eventually I will commit something that resolves this, but in
> the meantime, you should use vtu.****
>
> ** **
>
> JB****
>
> ** **
>
> *From:* paraview-bounces at paraview.org [mailto:
> paraview-bounces at paraview.org] *On Behalf Of *Mohamad M. Nasr-Azadani
> *Sent:* 18 April 2012 22:09
> *To:* Burlen Loring
> *Cc:* paraview at paraview.org
> *Subject:* Re: [Paraview] Particle tracer****
>
> ** **
>
> Hi Burlen, ****
>
> ** **
>
> I am hoping that Utkarsh could help figure things out. ****
>
> If you elaborate more on what you do and what happens, I could at least
> share my experience. ****
>
> I use *.vtr type files to generate particle trace and pathlines. ****
>
> The problem I have/had is that as soon as I apply any Temporal Filter to
> the *.vtr file series, it either gives me error message or crashes. ****
>
> I was very very very lucky that I found out that for the same dataset, if
> I use *.vtu format, no problems or crashing occurred. So, for now, I just
> used a Clip filter to extract my data into a *.vtu format and rewrite them,
> re-read them and do the ParticleTrace and ParticlePathlines. ****
>
> That was my experience. ****
>
> ** **
>
> Let me know if I could be of any help. ****
>
> Good luck, ****
>
> Mohamad****
>
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>
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>
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>
> On Wed, Apr 18, 2012 at 11:15 AM, Burlen Loring <bloring at lbl.gov> wrote:**
> **
>
> Hi Mohamad,
>
> I've been quietly following this thread in hopes that your interest in
> particle tracing will spark a response from the developers. I was unable to
> generate pathlines in image data in vti format I beleive I was using 3.10.0
> at the time. It was not clear to me if there was a bug or if I had the
> pipeline built incorrectly out of my own ignorance on how this works in PV.
> I posted a question with test data hoping for some advise,
> http://paraview.markmail.org/message/ek67niwr7xagaajz?q=burlen+order:date-backward&page=15however I did not receive any reply.
>
> Burlen****
>
>
>
> On 04/07/2012 05:28 AM, Mohamad M. Nasr-Azadani wrote: ****
>
>  I apologize for some mistakes.  ****
>
> The Powerpoint I was refering to can be found here. ****
>
> ** **
>
> *paraview*.org/Wiki/images/2/20/IEEE08_*Time-In-ParaView*.ppt****
>
> ** **
>
> ** **
>
> Best, ****
>
> Mohamad****
>
> ** **
>
> On Sat, Apr 7, 2012 at 5:22 AM, Mohamad M. Nasr-Azadani <mmnasr at gmail.com>
> wrote:****
>
> Hi all,  ****
>
> ** **
>
> This is what I doing: ****
>
> ** **
>
> 1- Load the PVD file (which holds the real time information associated
> with each *.vtr file)****
>
> ** **
>
> <?xml version="1.0"?>****
>
>  <VTKFile type="Collection" version="0.1" byte_order="LittleEndian"
> compressor="vtkZLibDataCompressor">  ****
>
>    <Collection>****
>
>     <DataSet timestep="0.0" group="" part="0" file="vel_vec_0.vtr"/>****
>
>     <DataSet timestep="0.2" group="" part="0" file="vel_vec_1.vtr"/>****
>
>     <DataSet timestep="0.4" group="" part="0" file="vel_vec_2.vtr"/>****
>
>     <DataSet timestep="0.6" group="" part="0" file="vel_vec_3.vtr"/>****
>
>     <DataSet timestep="0.8" group="" part="0" file="vel_vec_4.vtr"/>****
>
>     <DataSet timestep="1.0" group="" part="0" file="vel_vec_5.vtr"/>****
>
>     <DataSet timestep="1.2" group="" part="0" file="vel_vec_6.vtr"/>****
>
>     <DataSet timestep="1.4" group="" part="0" file="vel_vec_7.vtr"/>****
>
>     <DataSet timestep="1.6" group="" part="0" file="vel_vec_8.vtr"/>****
>
>     <DataSet timestep="1.8" group="" part="0" file="vel_vec_9.vtr"/>****
>
>     <DataSet timestep="2.0" group="" part="0" file="vel_vec_10.vtr"/>****
>
>   </Collection>****
>
> </VTKFile>****
>
> ** **
>
> ** **
>
> 2- Click on my data and create a "Temporal Cache" with "Cache Size=2". ***
> *
>
> ** **
>
> 3- From "Sources", I create a "Line". ****
>
> ** **
>
> 4- Click on TemporalCache1 and create a ParticleTracer. ****
>
>      When the menu pops up, I choose ****
>
>              a) Input: TemporalCache1****
>
>              b) Source: Line1****
>
>      Right after I click Ok, this is the message I get (note that this
> message is shown even before giving me the chance to change any flags on
> the "Properties" section related to the "ParticleTracer1".****
>
> /home/utkarsh/Kitware/superbuild/paraview/src/paraview/VTK/Filtering/vtkStreamingDemandDrivenPipeline.cxx,
> line 934****
>
> vtkPVPostFilterExecutive (0x4db4870): No maximum number of pieces has been
> set in the information for output port 0 on algorithm
> vtkPVPostFilter(0x4777fd0).****
>
> Luckily, Paraview does not crash and I can continue. ****
>
> After doing some research, I am guessing that this has something to do
> with the time conflicts (Pipeline fed into the filter and the animation
> viewer time). ****
>
> ** **
>
> *Observation:* Right after I create the ParticleTracer and receive the
> error message, the time shown in the animation viewer is increased from
> "0.0" to "0.2". Why? ****
>
> ** **
>
> 5- Recommended by the powerpoint, I set  ****
>
>          a) Time Step: True (1) ****
>
>          b) Ignore Pipeline Time: True (1)****
>
> ** **
>
> ** **
>
> 6- Now, I use "Animation View" as directed by the same powerpoint to feed
> the time into the ParticleTracer1 filter. ****
>
>          a) Mode: Sequence****
>
>          b) Create a keyframe for "ParticleTracer1". Double click on the
> bar and set: ****
>
>                    1: time: 0.2, (interpolation ramp), value: 1****
>
>                    2: time: 1.8, (), value: 9 ****
>
> ** **
>
> Note: I have varied all the combinations listed above to include/exclude
> the last/first steps. No luck! Nothing really happening. ****
>
>          ****
>
> 7- Play animation. Result: nothing happening? What is going on? ****
>
> ** **
>
> ** **
>
> *Observation: Using Paraview 3.8, I could see the animation without
> adjusting any parameters in the "Animation View" menu. Just the annoying
> error message was shown. However, I could do the same thing with Paraview
> 3.14, but it crashes after a few timesteps. *****
>
> ** **
>
> Anybody could share some hints on how to go about this? ****
>
> ** **
>
> Thanks, ****
>
> Mohanad****
>
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>
>         ****
>
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